Orbital-Dependent modifications of electronic structure across the magnetostructural transition in BaFe2As2

T. Shimojima*, K. Ishizaka, Y. Ishida, N. Katayama, K. Ohgushi, T. Kiss, M. Okawa, T. Togashi, X. Y. Wang, C. T. Chen, S. Watanabe, R. Kadota, T. Oguchi, A. Chainani, S. Shin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

151 Citations (Scopus)

Abstract

Laser angle-resolved photoemission spectroscopy (ARPES) is employed to investigate the temperature (T) dependence of the electronic structure in BaFe2As2 across the magnetostructural transition at TN∼140K. A drastic transformation in Fermi surface (FS) shape across TN is observed, as expected by first-principles band calculations. Polarization-dependent ARPES and band calculations consistently indicate that the observed FSs at kz∼π in the low-T antiferromagnetic state are dominated by the Fe3dzx orbital, leading to the twofold electronic structure. These results indicate that magnetostructural transition in BaFe2As2 accompanies orbital-dependent modifications in the electronic structure.

Original languageEnglish
Article number057002
JournalPhysical Review Letters
Volume104
Issue number5
DOIs
Publication statusPublished - 2010 Feb 3
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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